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Using Ubuntu 14.04, on my screen, the white is too bright.

Especially on chrome or other browsers the white background is too bright. Someone advised me to adjust the gamma, but how do I do this?

Elder Geek
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kevin wu
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    Change themes and background image ? Lower the brightness ? – Panther Apr 10 '15 at 02:32
  • In my experience, adjusting the gamma can darken colors that are not white, but anything that the computer thinks is pure white will not be affected by gamma changes. (At least with programs xrandr and xgamma). – Jellicle Sep 08 '17 at 17:26

2 Answers2

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Search on the dash for 'Startup Applications' and then click on the Application manager. Then Add a new startup application by clicking on the 'Add' button.

Give a name, and paste the line of this code in the 'Command' field. Click 'Save'.

PS: Change the number 0.7 to whatever the best. Lower number shows the best result.

/usr/bin/xgamma -gamma 0.7

enter image description here

Tharindu Pramuditha
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To get it to switch temporarily (until the next time you reboot, log out, etc):

Open a terminal and enter

xgamma -gamma .7

You can try other numbers, such as .6 or .8, and see which works for you best. If you want to make it so that it is automatically whichever gamma setting you like best on boot, install redshift through a terminal using:

sudo apt-get install redshift

Once it is installed, go into your Startup Application Preferences (if you search "Startup" in your dash it should come up). Click "Add". It doesn't really matter what you name it or if you leave a comment, but in the Command section put:

/usr/bin/redshift -t 6500K:5000K -g .7:.7:.7

(If you preferred a different number, you may use a different number.)

Colonel Trogdor
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